speak highly of (someone or something)
To enthusiastically endorse someone or something; to extol the virtues, benefits, or good qualities of someone or something. Our manager has spoken highly of these new developers. I hope they're up to the job! My dad has been speaking highly of this smartphone, so I think I might buy one for myself.
speak ˈhighly of somebody
praise somebody because you admire or respect their personal qualities or abilities: His teacher speaks very highly of him.Professor Heynman was very highly spoken of by his students. OPPOSITE: not/never have a good word to say for/about somebody/something